. >>> also in the news this half hour, president obama is inviting labor and business leaders to the white house this week to discuss ways to avert the so-called fiscal cliff in january. that's when a series of tax increases and government spending cuts will take effect, unless congress and the white house can work out a compromise on the budget. the president meets with congressional leaders on friday. >>> lance armstrong once again trying to distance his doping scandal from his cancer-fighting charity. armstrong resigned today from the board of livestrong. about aer stepping down as its chair. the international cycling union you'll recall stripped armstrong of his seven tour de france titles last month. >>> more questions about the investigation of the affair that ended the cia career of retired general david petraeus. senior lawmakers are asking why they and the president were not informed earlier. there are also questions about how the departure of petraeus may affect the investigation into the deadly attacks on the u.s. consulate in benghazi. >>> it's already taken several diffe